Abstarct: In this thesis, a two-loop controller is designed for bilateral boost inverter. Converting DC voltage to AC voltage in just one power stage is one of this inverter’s advantages. The main disadvantage of this inverter is being under-damped in both grid connected and stand-alone situations. This inverter is consists of two DC-DC bilateral boost converters which work via time-varying duty cycles. For controller design, a modeling method so-called generalized averaged model (GAM) is used to extract a linear time-invariant model from nonlinear system equations. In this study, a two-loop controller is designed for the aim of increasing damping and tracking reference voltage baxsed on LQR technique and GAM modeling. The inner loop consists of state feedback controller which increase system damping and the outer loop uses an output feedback controller which is designed baxsed on external disturbance frequency and reference voltage frequency. The coefficients of both controller is computed by LQR technique. For the goal of injecting power into the grid a third loop is added for controlling the output voltage phase and setting voltage reference for middle control loop. The simulation results and comparing with sliding mode controller shows reliable performance of proposed controller on this inverter in both grid connected and stand-alone situations.